Thanks! If you work on a high resolution canvas, it's not that hard to keep edges sharp. Other than that, just draw with bold hard lines, and smooth them out later, instead of gradually working from blurry to sharp. Does that make sense?

By lines, what I really meant was strokes. Sorry for not being clear. I don't really do line art like you see in comics, for instance.I guess you could say I do very thick and very sketchy line art, and when I add color to it, I blend the lines into the colors.

When you work with a few strong strokes of color to add a shape, instead of dozens of tiny light strokes, you can more easily avoid the fluffy edges.

I intend to start doing regular live streams soon, where I'll be able to more easily answer these things, and give demonstrations. So if you're still unsure about it, keep an eye out for that and drop by there and ask about it sometime. It'll be at twitch.tv/yngvar.

I usually work in black and white until the painting is roughly sketched out. How far I take the black and white sketch varies a bit though. Then I add color to it and flatten it and work with colors from there. How early you start with colors is up to you and what you're comfortable with.